windows-itpro-docs/windows/security/threat-protection/microsoft-defender-atp/powershell-example-code.md

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PowerShell code examples for the custom threat intelligence API	Use PowerShell code to create custom threat intelligence using REST API.	powershell, code examples, threat intelligence, custom threat intelligence, rest api, api	eADQiWindows 10XVcnh	met150	w10	deploy	library	security	macapara	mjcaparas	medium	dansimp	ITPro	M365-security-compliance	article

PowerShell code examples for the custom threat intelligence API (Deprecated)

Applies to:

• Microsoft Defender Advanced Threat Protection (Microsoft Defender ATP)

This article provides PowerShell code examples for using the custom threat intelligence API.

These code examples demonstrate the following tasks:

• Obtain an Azure AD access token
• Create headers
• Create calls to the custom threat intelligence API
• Create a new alert definition
• Create a new indicator of compromise

## Step 1: Obtain an Azure AD access token The following example demonstrates how to obtain an Azure AD access token that you can use to call methods in the custom threat intelligence API. After you obtain a token, you have 60 minutes to use this token in calls to the custom threat intelligence API before the token expires. After the token expires, you can generate a new token.

Replace the authUrl, clientid, and clientSecret values with the ones you got from Settings page in the portal:

$authUrl = 'Your Authorization URL'
$clientId = 'Your Client ID'
$clientSecret = 'Your Client Secret'

$tokenPayload = @{
    "resource"='https://graph.windows.net'
    "client_id" = $clientId
    "client_secret" = $clientSecret
    "grant_type"='client_credentials'}

$response = Invoke-RestMethod $authUrl -Method Post -Body $tokenPayload
$token = $response.access_token

## Step 2: Create headers used for the requests with the API Use the following code to create the headers used for the requests with the API:

$headers = @{
    "Content-Type"="application/json"
    "Accept"="application/json"
    "Authorization"="Bearer {0}" -f $token }

$apiBaseUrl = "https://ti.securitycenter.windows.com/V1.0/"

## Step 3: Create calls to the custom threat intelligence API After creating the headers, you can now create calls to the API. The following example demonstrates how you can view all the alert definition entities:

$alertDefinitions =
    (Invoke-RestMethod ("{0}AlertDefinitions" -f $apiBaseUrl) -Method Get -Headers $headers).value

The response is empty on initial use of the API.

## Step 4: Create a new alert definition The following example demonstrates how you to create a new alert definition.

$alertDefinitionPayload = @{
    "Name"= "The alert's name"
    "Severity"= "Low"
    "InternalDescription"= "An internal description of the Alert"
    "Title"= "The Title"
    "UxDescription"= "Description of the alerts"
    "RecommendedAction"= "The alert's recommended action"
    "Category"= "Trojan"
    "Enabled"= "true"}

$alertDefinition =
    Invoke-RestMethod ("{0}AlertDefinitions" -f $apiBaseUrl) `
        -Method Post -Headers $headers -Body ($alertDefinitionPayload | ConvertTo-Json)

## Step 5: Create a new indicator of compromise You can now use the alert ID obtained from creating a new alert definition to create a new indicator of compromise.

$iocPayload = @{
    "Type"="Sha1"
    "Value"="dead1111eeaabbccddeeaabbccddee11ffffffff"
    "DetectionFunction"="Equals"
    "Enabled"="true"
    "AlertDefinition@odata.bind"="AlertDefinitions({0})" -f $alertDefinitionId }


$ioc =
    Invoke-RestMethod ("{0}IndicatorsOfCompromise" -f $apiBaseUrl) `
         -Method Post -Headers $headers -Body ($iocPayload | ConvertTo-Json)

Complete code

You can use the complete code to create calls to the API.

$authUrl = 'Your Authorization URL'
$clientId = 'Your Client ID'
$clientSecret = 'Your Client Secret'

$tokenPayload = @{
    "resource"='https://graph.windows.net'
    "client_id" = $clientId
    "client_secret" = $clientSecret
    "grant_type"='client_credentials'}

$response = Invoke-RestMethod $authUrl -Method Post -Body $tokenPayload
$token = $response.access_token

$headers = @{
    "Content-Type"="application/json"
    "Accept"="application/json"
    "Authorization"="Bearer {0}" -f $token }

$apiBaseUrl = "https://ti.securitycenter.windows.com/V1.0/"

$alertDefinitions =
    (Invoke-RestMethod ("{0}AlertDefinitions" -f $apiBaseUrl) -Method Get -Headers $headers).value

$alertDefinitionPayload = @{
    "Name"= "The alert's name"
    "Severity"= "Low"
    "InternalDescription"= "An internal description of the Alert"
    "Title"= "The Title"
    "UxDescription"= "Description of the alerts"
    "RecommendedAction"= "The alert's recommended action"
    "Category"= "Trojan"
    "Enabled"= "true"}

$alertDefinition =
    Invoke-RestMethod ("{0}AlertDefinitions" -f $apiBaseUrl) `
        -Method Post -Headers $headers -Body ($alertDefinitionPayload | ConvertTo-Json)

$alertDefinitionId = $alertDefinition.Id

$iocPayload = @{
    "Type"="Sha1"
    "Value"="dead1111eeaabbccddeeaabbccddee11ffffffff"
    "DetectionFunction"="Equals"
    "Enabled"="true"
    "AlertDefinition@odata.bind"="AlertDefinitions({0})" -f $alertDefinitionId }


$ioc =
    Invoke-RestMethod ("{0}IndicatorsOfCompromise" -f $apiBaseUrl) `
         -Method Post -Headers $headers -Body ($iocPayload | ConvertTo-Json)

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Related topics

• Understand threat intelligence concepts
• Enable the custom threat intelligence API in Microsoft Defender ATP
• Create custom alerts using the threat intelligence API
• Python code examples for the custom threat intelligence API
• Experiment with custom threat intelligence alerts
• Troubleshoot custom threat intelligence issues